>> reporter: for stars these days, it's millions, especially own the red carpet. amy adams wore earrings, a necklace and added an emerald and diamond bracelet to the oscars, for a look worth $1.35 million. jennifer garner was dripping in diamonds this year. a necklace, earrings and bracelet worth $2.5 million. here at cannes, big-time security protected not just the ladies, but the loot. just look at the uniformed security lining the staircase in this video. well, beyond the photo op, there is plenty of security here on the red carpet behind me, guarding the stars and starlets. some that you see, like the police officers here, others that you don't see. tonight, police are reviewing surveillance video, hoping to catch a thief, or thieves, before they slip away. lama hasan, abc news, cannes. and on another note, we want you to know that tonight on "20/20," there will be a different story about big theft, thieves in the office. stunning office thievery, and it's "work wars," tonight on "20/20."